We conclude stating that a complete picture of the ultra high energy universe needs to account for all messengers till the highest energies. The sensitivity required to detect UHE neutrinos and gamma rays, as well as the highest energy tail of CR, is still far from being reached, new technologies are needed and future space observatories, with improved photon detection techniques, allowing the needed statistics, might open a new era in the physics of UHE cosmic radiation [1]}, [2]}, [3]}.
